JPH04241310A - Rotational disposition implement device for endoscope - Google Patents

Abstract

PURPOSE:To surely hold the coupling of a rotational disposition member and a rotating force transmitting member without disengaging even if the rotational disposition member is rotated to either clockwise or counterclockwise. CONSTITUTION:An engaging hole 28a bored in a supporting shaft 28 of the rotational disposition member 16 and a detaining hole 24a bored in a front end member 23 of the rotating force transmitting member 17 are matched with each other and a connecting pin 30 is inserted in this state into these holes to connect the supporting shaft 28 to the rotating force transmitting member 17. The detaining hole 24a is closed by a pin stopper cover 25 to prevent the disengagement of the connecting pin 30. Torque is transmitted via the connecting pin 30 to the rotational disposition member 16. The exchange of the rotational disposition member 16 is executed by removing the connecting pin 30.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides an endoscope capable of easily attaching and detaching a rotational treatment member to and from a rotational force transmitting member provided at the tip of an endoscope insertion portion, and preventing it from falling off when attached. The present invention relates to a rotating treatment instrument device.

0002

2. Description of the Related Art In recent years, industrial endoscopes have been widely used in the industrial field, which are capable of inspecting the insides of chemical plant piping, engines, etc. without disassembling them.

For example, in a jet engine, if a damaged part such as a chip is found on the cutting edge of a rotatably driven turbine blade through an endoscopy, even if the damaged part is small, if left as is, stress will be applied to the damaged part. In a concentrated manner, the damaged area becomes large and the entire blade needs to be replaced.

[0004] Conventionally, even if replacement was not required, if a damaged part was discovered, the solution was to disassemble the engine and grind the area around the chipped part. However, the problem was that it took a long time to repair.

[0005] For this reason, a conventional example (for example, disclosed in Japanese Patent Application Laid-Open No. 2002-121002) in which a rotating treatment member such as a grindstone is attached to the tip of an endoscope, and this rotational treatment member is inserted into a jet engine to grind the damaged part. Publication No. 58-162924).

[0006]

[Problems to be Solved by the Invention] In many cases, this type of rotational treatment member is provided at the distal end of the endoscope insertion section, and has a threaded portion, a three-pronged It is made detachable via a fastening means such as a chuck or collet chuck, and can be replaced as appropriate depending on the purpose of treatment, use, etc.

For example, when treating a jet engine blade or the like using an endoscope equipped with a rotating treatment member, it is necessary to reliably prevent the grindstone from falling into the engine. Generally, when grinding metal, the grinding characteristics differ depending on the rotation direction of the whetstone, so it is necessary to select the rotation direction and use it properly.However, when the whetstone is attached and detached by screwing, the grindstone is pressed against the blade etc. When performing treatment, if the rotational force transmitting member and the grindstone are rotated in a direction in which the threaded connection between the grindstone and the grindstone loosens, the grindstone will fall off, making the direction of rotation unique and inconvenient to use.

Furthermore, with three-jaw chucks, collet chucks, etc., the grindstone is fixed to the rotational force transmission member only by frictional force, so there is a risk that the grindstone may fall off due to slight loosening of the chuck, so the fastening force and It is necessary to fully understand the relationship with the transmitted torque in advance, which results in poor workability.

Furthermore, fastening the rotating treatment member to the rotational force transmitting member using a three-jaw chuck or a collet chuck increases the size of the structure and increases the weight, so it cannot be used at the tip of an endoscope. Have difficulty.

[0010] Furthermore, in the case where the generally widely used gable nut is employed as the fastening means, individual differences in the tightening torque tend to appear, and if a uniform tightening torque is to be obtained, the replacement work becomes more complicated.

The present invention has been made in view of the above circumstances, and it is possible to easily and reliably attach a rotational treatment member to a rotational force transmission member provided at the tip of an insertion section without falling off. The purpose of the present invention is to provide a rotary treatment instrument device for an endoscope that is easy to use.

0012

[Means for Solving the Problems] A rotary treatment instrument device for an endoscope according to the present invention includes, at a distal end portion of the endoscope, at least an objective optical system and a rotational force transmission member that supports a rotary treatment member. In this step, a connecting pin that is inserted into a hollow portion into which a support shaft provided in the rotation treatment member is inserted and an engagement hole formed in a direction perpendicular to the axis of the support shaft is hung at the tip of the rotational force transmission member. The locking mechanism includes a locking hole for locking the locking hole, a pin removal prevention cover that can open and close the locking hole, and a biasing member that constantly urges the pin removal prevention cover in the direction in which the locking hole is closed.

[0013]

[Operation] In the present invention, torque is transmitted from the rotational force transmission member to the rotational treatment member by inserting the torque into the engagement hole drilled in the support shaft of the rotational treatment member, and by inserting the torque into the engagement hole provided in the rotational force transmission member. This is done via a connecting pin that is hooked to the latching hole, and this connecting pin is prevented from coming off by a pin retaining cover that closes the latching hole. The force transmission member and the rotational treatment member are never uncoupled.

[0014]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

1 to 11 show a first embodiment of the present invention, FIG. 1 is a longitudinal cross-sectional view of the distal end of an endoscope, and FIG. 2 is a longitudinal cross-sectional view showing the state of connection between the rotational force transmission member and the rotational treatment member. 3 is a view in the direction of the III arrow in FIG. 4, FIG. 4 is an overall configuration diagram of the endoscope device, FIG. 5 is an overall configuration diagram of another endoscope device, and FIG. 7 is a sectional view of a main part of another endoscope protection cover, FIG. 8 is a sectional view of a main part of another endoscope protection cover, and FIG. 9 is a sectional view of a main part of an endoscope tip holder. , Figure 10 is Figure 9
FIG. 11 is a sectional view of a main part of another endoscope tip holder.

(Configuration) As shown in FIG. 4, the endoscope apparatus of this embodiment includes an endoscope 1A, a light source device 2 and a rotation drive unit 3 connected to the endoscope 1A, and a cord 4. The controller 5 is connected to the rotary drive unit 3 via a controller 5.

The endoscope 1A includes an elongated insertion section 6, an operation section 7 connected to the rear end of the insertion section 6, a connection section 8 connected to the rear end of the operation section 7, and the A universal cord 9 is provided that extends laterally from the operating section 7. An end of this universal cord 9 is detachably connected to the light source device 2 via a connector 10. Further, an eyepiece section 11 is provided on the side of the connection section 8 .

On the other hand, the insertion section 6 includes, in order from the distal end side:
Hard tip portion 12, bendable curved portion 13, and hard portion 1
It consists of 4. Further, a bending knob 15 for performing a bending operation of the bending section 13 is provided on the side of the operation section 7.

Note that FIG. 5 shows an endoscope 1B in which the insertion section 6 consists of only a rigid section 14. In the present invention, either of the above endoscopes 1A and 1B can be applied, and the insertion section 6 may be semi-rigid such as an interlocking spiral tube.

Reference numeral 18 denotes a jet engine as an object to be inspected, and an access port 20a is provided in a partition wall 20 covering a compressor blade 19 of this jet engine 18.
is drilled, and the distal end portion 12 of the insertion portion 6 of the endoscope 1 is inserted into the interior through the access port 20a.

As shown in FIGS. 1 and 3, the endoscope 1A
A tip main body 12a provided at the tip of the tip 12 of the insertion section 6.
Then, the illumination light from the light source device 2 is applied to the object to be inspected (in the figure, the compressor blades 19 of the jet engine 18
) and an objective optical system 22 for observing the object to be inspected, and the tip member 23 of the rotational force transmitting member 17 is supported via a bearing 23a. An image formed by the objective optical system 22 is guided to the eyepiece section 11 via an image guide 22a. Further, the tip member 23 of the rotational force transmission member 17 is connected to the rotational drive section 3 via a flexible shaft 23b.

As shown in FIGS. 1 and 2, a hollow portion 2 is provided at the center of rotation of the distal end surface of the distal end member 23 of the rotational force transmitting member 17.
4 is drilled therein, and furthermore, a locking hole 2 of a predetermined depth passes through the hollow portion 24 in the direction orthogonal to the axis of the tip of the tip member 23.
4a is bored. Further, a pin removal prevention cover 25 is inserted through the outer periphery of the distal end side of the distal end member 23, and a stopper 27 is fixed to the edge of the distal end member 23 by means such as adhesive. Furthermore, the tip member 23
A spring 26 is interposed between the flange 23c formed in the middle and the pin removal prevention cover 25 to constantly bias the pin removal prevention cover 25 toward the stopper 27. The pin removal prevention cover 25 is the stopper 2
7, the locking hole 24a formed in the tip member 23 is closed.

Reference numeral 16 denotes a rotation treatment member, and an insertion hole 28a is bored in the direction perpendicular to the axis of a support shaft 28 provided in the rotation treatment member 16, and a grindstone 29 is mounted at the tip of the support shaft 28. It is provided.

The support shaft 28 of the rotation treatment member 16 is inserted into the hollow portion 24 formed in the tip member 23, and the engagement hole 28a and the locking hole 24a formed in the tip member 23 are connected to each other.
A connecting pin 30 is inserted through the connecting pin 30, and the distal end member 23 and the rotating treatment member 16 are connected via this connecting pin 30.

(Operation) Next, the operation of the embodiment having the above configuration will be explained.

When inspecting the damaged state of the compressor blade 19 of the jet engine 18 using the endoscope 1A and repairing the damaged part, first, the distal end 12 of the endoscope 1A is inserted into the jet engine 18. The compressor blade 19 is inserted into the access port 20a formed in the partition wall 20, and the operator sequentially advances the insertion part 6 while observing the image of the eyepiece 11 to detect a damaged part of the compressor blade 19.

When a damaged portion of the compressor blade 19 is found, the controller 5 drives the rotary drive unit 3 in a predetermined manner, and the torque from the rotary drive unit 3 is used to rotate the flexible shaft 23b of the rotational force transmitting member 17.
The distal end member 23 fixed to the distal end of is rotated at high speed, and the rotary treatment member 16 connected to this distal end member 23 via a connecting pin 30 is rotated at high speed in the same direction.

Then, this grindstone 29 rotating at high speed is pressed against the damaged portion of the compressor blade 19 to perform grinding treatment.

By the way, since the grinding characteristics of the grindstone 29 differ depending on the rotation direction,
When grinding a metal such as No. 9, the rotation direction of the grindstone 29 must be selected. Torque is transmitted to the grindstone 29 through the connection pin 30, and the hook that engages the connection pin 30 is The stop hole 24a is connected to the tip member 23.
The connecting pin 30 does not fall out during rotation because it is closed by the pin removal prevention cover 25 inserted through the pin removal prevention cover 25, and this pin removal prevention cover 25 is always urged in the closing direction by the spring 26. Tip member 23
Since the rotation treatment member 16 and the rotation treatment member 16 are connected via the connection pin 30, torque can be reliably transmitted to the rotation treatment member 16 regardless of whether the tip member 23 is rotated left or right.

Next, when replacing the rotational treatment member 16 attached to the distal end member 23 of the rotational force transmitting member 17 protruding from the distal end surface of the distal end portion 12 of the endoscope 1A, first insert it into the distal end member 23. The pin retaining cover 25 is slid toward the flange 23c against the biasing force of the spring 26 to expose the locking hole 24a formed in the tip member 23.

[0031] Then, the connecting pin 3 is inserted from this latch hole 24a.
0, and then the support shaft 28 of the rotation treatment member 16
is pulled out from the hollow part 24 formed in the tip member 23.

Thereafter, the support shaft 28 of the new rotation treatment member 16 is inserted into the hollow portion 24 of the tip member 23, and the engagement hole 28a drilled in the support shaft 28 is aligned with the locking hole 24a. , the connecting pin 30 is inserted into the locking hole 24a and the engagement hole 28a to connect the tip member 23 and the rotational treatment member 16.

[0033] Then, the pin retaining cover 25 closes the locking hole 24a.

[0034] In this way, the rotary treatment member 16 can be easily replaced without using tools or the like, resulting in good workability.

By the way, as shown in FIG. 6, in a so-called small-diameter endoscope (including flexible and rigid) in which the diameter of the insertion section 6 is relatively small, the insertion section 6 is prone to bending during handling such as storage and transportation. A protective cover 36 is attached to prevent this.

[0036] When observing a relatively shallow region using a small-diameter endoscope with a long insertion section 6, if the protective cover 36 is removed, the entire insertion section 6 will be bent and easily broken.

In such a case, without removing the protective cover 36, first construct the protective cover 36, and move the movable member 37 that covers the distal end side of the insertion section 6 along the protective member 38 that covers the proximal direction. By sliding it rearward, the endoscope distal end 12 is relatively exposed through the escape hole 37a formed in the distal end surface of the moving member 37 (state of (b)).

As a result, shallow examination sites can be easily observed using a narrow endoscope having a relatively long insertion section 6. Note that the moving member 37 is provided with an O-ring 39 so as to generate an appropriate amount of friction during movement. Further, reference numeral 40 is a stopper.

Further, as shown in FIG. 7, the movable member 37 may be screwed into the protective member 38 via the threaded portion 41, and the movable member 37 may be rotated to move forward and backward.

Furthermore, as shown in FIG.
is biased toward the distal end by a coil spring 42, and a positioning pin 43 is provided on this movable member 37, and engagement grooves 44 with which this positioning pin 43 engages are provided at predetermined intervals on the protection member 38, and the internal view is The exposed length of the mirror tip 12 may be set as appropriate.

Furthermore, as shown in FIGS. 9 and 10, when holding the endoscope tip 12 in the center of the tube 46 in a rotation endoscope and photographing the inner wall of the tube 46, etc. for,
A holder 47 is attached to the endoscope tip 12, the endoscope tip 12 is inserted into the tube 46, and when the desired observation site is reached,
The operating wire 49 inserted into the guide pipe 48 attached to the endoscope insertion section 6 is pulled on the proximal side.

Then, the guide ring 50 connected to the tip of the wire 49 moves rearward along the insertion section 6.

The distal end of the guide pipe 48 is fixed to the insertion section 6 via a fixing ring 52 having an elastic member 51 on the inner periphery having a diameter slightly smaller than the diameter of the insertion section 6. 52 and the above guide ring 50
At least three wire rods 53 having resilience are disposed at equal intervals on the circumference and are connected to each other via wire rods 53 having resilience.

When the guide ring 50 moves backward along the insertion section 6, the wire rod 53 bends outward, and the bending pressure of the wire rod 53 causes the endoscope tip 12 to move into the tube 46.
(state (b)).

Note that if two wires 49 are provided at positions shifted by 180 degrees, the guide ring 50 can be moved smoothly. Further, when the endoscope distal end portion 12 is fixed at the center of the tube 46, a mechanism for locking the wire 49 may be provided on the proximal side. Furthermore, if the wire 53 is bent slightly outward in the restored state, it will not be bent inward.

Further, when the tensile force of the wire 49 is released, the wire 53 returns to its initial state due to its own restoring force.

Note that, as shown in FIG. 11, the wire rod 53
may be the rubber member 54.

(Second Embodiment) FIG. 12 is a perspective view of the distal end portion of an endoscope in different states according to a second embodiment of the present invention.

This embodiment is intended to ease the operability of the pin removal prevention cover 25 when replacing the rotation treatment member 16.

When replacing the rotation treatment member 16, first, the pin removal prevention cover 25 inserted around the outer periphery of the tip member 23 is slid rearward against the biasing force of the spring 26. A slit 25a is formed along the axial direction on one side of the pin-removal prevention cover 25, and a protrusion 61 that engages with this slit 25 is formed on one side of the outer circumference of the tip member 23.

Then, when the upper end of the slit 25a comes off the lower end of the protruding strip 61, the pin removal prevention cover 2
5, and the upper end of this pin removal prevention cover 25 is hooked to the lower end of the protruding strip 61.

Then, the pin removal prevention cover 25 is held in a retracted state, and the locking hole 24a formed in the tip member 23 is exposed (state (b)).

Then, the connecting pin 3 is inserted from the above-mentioned latching hole 24a.
0, and remove the support shaft 28 of the rotating treatment member 16 inserted into the hollow part 24 of the tip member 23 (state of (c)).
.

After that, the support shaft 28 of the new rotation treatment member 16 is inserted into the hollow part 24 of the tip member 23, and the engagement hole 28a drilled in the support shaft 28 is aligned with the locking hole 24a. Then, the connecting pin 30 is inserted to fix the support shaft 28 to the tip member 23.

Then, when the pin removal prevention cover 25 is turned and the slit 25a engages with the protrusion 61, the pin removal prevention cover 25 receives the biasing force of the spring 26 and slides toward the tip. The latch hole 24a is closed.

In this manner, when the pin removal prevention cover 25 is retracted, the pin removal prevention cover 25 is hooked to the end of the protrusion 61, so that the work efficiency when replacing the rotation treatment member 16 is improved. good.

(Third Embodiment) FIG. 13 is a longitudinal sectional view of the distal end portion of an endoscope according to a third embodiment of the present invention.

In this embodiment, the pin removal prevention cover 25 is screwed onto the tip end member 23 of the rotational force transmission member 17, and by rotating the pin removal prevention cover 25, the pin removal prevention cover 25 is moved forward and backward.

When replacing the rotational treatment member 16, first, a rod-shaped jig 66 is engaged with the engaging portion 23d formed in the middle of the tip member 23 of the rotational force transmitting member 17, and the tip member 23 is replaced. Hold 23.

Next, the pin removal prevention cover 25 screwed onto the tip member 23 via the threaded portion 67 is rotated, and the pin removal prevention cover 25 is moved backward against the biasing force of the spring 26.

[0061] Then, the relief hole 25b formed in the pin-removal prevention cover 25 is aligned with the locking hole 24a formed in the tip member 23. The escape hole 25b has a slightly larger diameter than the latching hole 24a, and when the pin removal prevention cover 25 is latched to a stopper 27 provided on the edge of the tip member 23, Escape hole 25b
has moved to a position where it does not completely align with the locking hole 24a.

After that, the connecting pin 30 inserted into the locking hole 24a is pulled out, and the hollow part 24 of the tip member 23 is removed.
The support shaft 28 of the rotation treatment member 16 inserted into the rotation treatment member 16 is removed, and the support shaft 28 of a new rotation treatment member 16 is inserted into the hollow portion 24.

Then, the engagement hole 28a drilled in the support shaft 28 is aligned with the locking hole 24a, and the connection pin 3 is inserted.
0 to connect the rotary treatment member 16 to the distal end member 23.

Thereafter, the pin removal prevention cover 25 is returned to close the locking hole 24a.

The lower end of the spring 26 is inserted into a stopper hole 23e formed in the tip member 23 and fixed by means such as welding.

[0066]

[Effects of the Invention] As explained above, according to the present invention,
The support shaft of the rotational treatment member is inserted into a hollow portion provided at the tip of the rotational force transmission member, and an engagement hole drilled in a direction perpendicular to the axis of the support shaft and a latching hole drilled at the tip. By inserting a connecting pin into the parts, the above-mentioned locking part was closed with a pin-removal prevention cover, and this pin-removal-prevention cover was constantly urged in the direction of closing the locking part with a biasing member, so that the above-mentioned Even if the rotating treatment member is rotated to the left or right, the rotating treatment member is reliably held and can be prevented from falling off.

Furthermore, since the rotary treatment member can be removed by removing the connecting pin, the rotary treatment member can be easily replaced.

[Brief explanation of the drawing]

[Fig. 1] Fig. 1 to Fig. 11 show a first embodiment of the present invention, and Fig. 1 is a longitudinal sectional view of the distal end of an endoscope.

[Fig. 2] A vertical cross-sectional view showing a coupled state of a rotational force transmission member and a rotational treatment member.

[Figure 3] III arrow view in Figure 4

[Figure 4] Overall configuration diagram of the endoscope device

[Figure 5] Overall configuration diagram of another endoscope device

[Figure 6] Cross-sectional view of main parts of endoscope protective cover

[Figure 7] Cross-sectional view of main parts of another endoscope protection cover

[Figure 8] Cross-sectional view of main parts of another endoscope protection cover

[Figure 9] Cross-sectional view of main parts of endoscope tip holder

[Figure 10] XX sectional view in Figure 9

[Fig. 11] Cross-sectional view of main parts of another endoscope tip holder

[Figure 12
] Perspective views of different states of the distal end of an endoscope according to a second embodiment of the present invention

FIG. 13 is a longitudinal cross-sectional view of the distal end of an endoscope according to a third embodiment of the present invention.

[Explanation of symbols]

1A, 1B...Endoscope 12...Distal end 22...Objective optical system 16...Rotary treatment member 17...Rotational force transmission member 23... Tip portion 28 (of the rotational force transmission member)...
……Support shaft 24…………Hollow part 28a……Insertion hole 30……Connection pin 24a……Latching hole 25……Pin removal prevention cover 26…… ...Biasing member

Claims (1)

[Claims] 1. An endoscope comprising, at a distal end of the endoscope, at least an objective optical system and a rotational force transmission member supporting a rotational treatment member, wherein a rotational force transmission member is provided at a distal end of the rotational force transmission member and supports the rotational treatment member. A hollow part into which the provided support shaft is inserted, a latching hole into which a connecting pin inserted into the insertion hole bored in the direction orthogonal to the axis of the support shaft is latched, and a pin extractor which can be opened and closed freely in the latching hole. A rotary treatment instrument device for an endoscope, comprising a stop cover and a biasing member that constantly biases the pin removal preventive cover in the direction of closing the locking hole.